Steam-generator



(No Model.) 2 Sheets-Sheet 1. A. P. HOLCOMB.

STEAM GENERATOR.

No. 324,694. Patented Aug. 18, 1885.

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(No Model.) 2 SheetsSheet 2. A. P. I-IOLOOMB.

STEAM GENERATOR.

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ABEL P. HOLCOMB, OF SILVER GREEK, NEW' YORK.

STEAM-GENERATOR.

SPECIFICATION forming part. of Letters Patent No. 32%,69e, dated August 18, 1885.

Application filed May [6, 1895. (No model.)

To all whom it may concern.-

Be it known that I, ABEL P. I-IoLooMB, of Silver Creek, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Steam-Generators, of which the following is a specification.

This invention relates to an improvement in that class of steam-generators which is constructed for producing steam under a low pressure for heating buildings and for similar purposes, and which may also be employed for heating the water for hot-waterheating apparatus.

The object of my invention is to produce a simple, compact, and eificient steam-generator in which the flame and hot gases are advantageousl y brought in contact with a large heating-surface, and to so construct the generator that it can be easily cleaned.

.My invention consists, to these ends, of the improvements which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure 1 is a sectional elevation of my improved steam-generator. Figs. 2 and 3 are horizontal sections in lines 00 0c and y; 3 Fig. 1, respectively. Fig. 4 is an outside elevation of two of the upright sections of the generator. Fig. 5 is a side elevation of one of said sections. Fig. 6 is a vertical crosssect-ion of the movable trough at the lower end of the descending flue. Fig. 7 is a fragmentary horizontal section of the same. Fig. 8 is a fragmentary vertical section of the upper part of the generator.

Like letters of reference refer to like parts in the several figures.

A represents the fire-pot,surrounded by an annular waterchamber, A, which is preferably cast in one piece with the fire-pot.

B represents upright water-chambers ar-. ranged radially upon the annular water-chamber A, and communicating therewith by openings formed in the lower ends of the chambers B and in the top plate of the annular chamber A. The bodies I) of the upright chambers are made flat and narrow, so as to form upright flues 0 between the bodies b.

1) represents lateral enlargements formed at the outer edges of the bodies I) in such manner that the enlargements b of two adjacent chambers B come in contact with each other and close the outer side of the flue 0, except near the top of the chambers B, where the enlargements b are omitted, to leave openings or spaces cl between the chambers B, as shown in Figs. 4 and 5, through which the hot gases pass outwardly from the upper ends of the ascending flues c. The inner portions of the bodies b of the chambers B overhang the tirepot, and their inner ends rest against each other and form a cylindrical or slightly-tapering fuelunagazine, E, which may be provided with a suitable tubular lining, e.

F represents the top chamber, which rests upon the upper ends of the upright chambers 13 and communicates therewith by openings formed in the upper ends of the chambers B and in the bottom plate of the chamber F.

f represents vertical tie-rods, which pass through the top chamber, F, upright chambers B, and the annular chamber A, and secure these parts together.

represents the chute through which the fuel is introduced into the magazine E. It represents the pipe through which the steam or hot water escapes from the top chamber, F, and h is the feed pipe, which enters the annular chamber A.

I represents the outer shell or case, which incloses the generator,and which forms around the same an annular descending flue, i, which connects at the rearside of the generator with the smoke-pipe J. The case I'consists of a metallic shell lined with firebrick or other suitable material, and rests upon an annular frame or chamber, K, which in turn is sup ported by the annular base L. The lower edge or portion of the case I surrounds the annular chamber A, and is arranged eccentric with the latter in such manner that the narrowest portion of the opening, between both parts, lies 011 the rear side of the generator, nearest the smoke-pipe, while the widest portion of said opening lies at the front side, farthest from said pipe, whereby the draft is distributed throughout the flue i all around the generator, and prevented from being excessive near the smoke-flue and weak at the front side of the generator.

M is an annular trough, base L between the ring which rests on the K and the annular chamber A, and which is provided in its bottom with a series of openings, at, which can be made to register or to break joints with corresponding openings, at, in the top plate of the base L by turning the trough M. Upon causing the openings at nto coincide, the material which has accumulated in the flue i can be discharged into the ashpit 0, while upon breaking the coincidence of these openings the lower end of the flue is closed.

The trough M may be guided in its movements by rollers 0 attached to the base L.

The ash-pit O is provided with a pipe, 1), and damper p, by which the ash-pit can be placed in communication with the smoke-pipe while cleaning the flue i.

The top of the case I is provided with openingsq, in line with the flue t, for giving access to the flue from above for cleaning the flue.

The top chamber, F, and the top of the case I, are provided with vertical passages f j, in line with the ascending flues c, as represented in Fig. 9, so that, the latter can be reached and cleaned from above.

I prefer to employ an annular trough, M, as shown, but a simple perforated ring may be used instead, if desired.

r is a grate arranged in the fire-pot A. The flame and hot gases arising from the fuel on the grate pass upwardly through the ascending lines 0, between the vertical water-chambers B, then outwardly through the openings (2, between said chambers, and then downwardly through the annular fluet' to the annular chamber K, and thence to the smoke-pipe J. In this manner the parts of the generator are traversed and enveloped by the flame and hot gases, and the products of the combustion escape near the lower end of the generator, where the cold water enters the same and the temperature is lowest, whereby the upper part of the generator from which the steam or hot water is taken off is kept properly heated.

8 represents the damper arranged in the smoke-pipe J, and provided with a suitable weight, 8, which tends to open the damper.

t is a weighted damper, which controls the admission of air to the ash-pit.

S is a two-armed lever pivoted at and having its arms connected, respectively, by chains 8 t with the dampers s and t.

I claim as my invention 1. The combination, with an annular waterchamber, A, of radial upright water-chambers B, resting upon the chamber A, and each composed of upright radial portions 6, separated by ascending flues c and outer lateral enlargements, b, which form the outer wall of the generator, and are contracted at their upper ends to form passages d, a top chamber, F, resting on the chambers B, and an annular descending flue, i, surrounding the chambers B, substantially as set forth.

2. The combination, with the steam-generator and its inclosing-case, separated by an annular return-flue, and the smoke-pipe connecting with the lower end of said return-flue, of a passage of communication between the return-flue and the smoke-pipe, which passage is narrowest near the smokepipe and increases in width to the point farthest removed from the smoke-pipe, whereby the draft is more evenly distributed, substantially as set forth.

3. The combination, with a circular steamgenerator, an inclosing circular case separated from the generator by an annular return-flue, and a smoke-pipe connected with the lower end of said return-flue, of an eccentric passage connecting the return-flue with the smokepipe, said passage having its narrowest point arranged nearest the smoke-pi pe, substantially as set forth.

4. The combination, with a circular steamgenerator and its inclosing-case, separated by an annular flue, of a base, L, inclosing the ash-pit and provided with openings n, in line with said flue, and an annular plate or trough, M, provided with corresponding openings, m, substantially as set forth.

Witness my hand this 5th day of May, 1885.

ABEL P. HOLQOMB.

Witnesses:

MELVIN MoNTeoMnRY, W. S. TALCO'lT. 

